18069480 has 288 divisors, whose sum is σ = 71940960. Its totient is φ = 4043520.

The previous prime is 18069473. The next prime is 18069511. The reversal of 18069480 is 8496081.

It is a happy number.

It is a super-2 number, since 2×18069480² = 653012214940800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1389954 + ... + 1389966.

It is an arithmetic number, because the mean of its divisors is an integer number (249795).

Almost surely, 2^18069480 is an apocalyptic number.

18069480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18069480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35970480).

18069480 is an abundant number, since it is smaller than the sum of its proper divisors (53871480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18069480 is a wasteful number, since it uses less digits than its factorization.

18069480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 18069480 is about 4250.8210971529. The cubic root of 18069480 is about 262.4109085416.

The spelling of 18069480 in words is "eighteen million, sixty-nine thousand, four hundred eighty".